I'm a bit confused, because Nyx once said Freelancers aren't allowed to hire other Freelancers. How is that now exactly? Can Freelancers assist each other, can they hire each other or how is that exaclty? Like, common sense seems to be not work in that case. And please don't give me speculations but facts.
This was discussed (and clarified later on?) in a different thread, which I can't find unfortunately.
Wasn't it forbidden to hire Freelancers as a generic ID (Pirate ID, for example)?
Freelancers are not allowed to attack (i.e. open fire first) unless on contract with non-generic ID (rule 4 here). Assisting in an ongoing fight is another matter and regulated by ID line that @Snoflek quoted above.
The point of this rule is that freelancer cannot hire another freelancer to attack someone, if I understand it correctly.